The fossil record reveals that the structure of shoulder joints in birds, which is essential for flight, is an adaptation that originated in ____.
A) nonflying birds
B) ancient bats
C) ancestral birds
D) nonflying dinosaurs
E) flying dinosaurs

Question

Quizplus · Accepted Answer

The fossil record shows that the structure of shoulder joints in birds, which is essential for flight, is an adaptation that originated in nonflying dinosaurs.

The Fossil Record Reveals That the Structure of Shoulder Joints